What is methadone?
Methadone is an opioid medication. An opioid is sometimes called a narcotic.
Methadone reduces withdrawal symptoms in people addicted to heroin or other narcotic drugs without causing the “high” associated with the drug addiction.
Methadone is used as a pain reliever and as part of drug addiction detoxification and maintenance programs. It is available only from a certified pharmacy.
You should not use methadone if you have severe asthma or breathing problems, or a blockage in your stomach or intestines.
Methadone can slow or stop your breathing, and may be habit-forming. MISUSE OF THIS MEDICINE CAN CAUSE ADDICTION, OVERDOSE, OR DEATH, especially in a child or other person using the medicine without a prescription.
Taking this medicine during pregnancy may cause life-threatening withdrawal symptoms in the newborn.
Fatal side effects can occur if you use this medicine with alcohol, or with other drugs that cause drowsiness or slow your breathing.
Methadone may cause a life-threatening heart rhythm disorder. Call your doctor at once if you have a headache with chest pain and severe dizziness, and fast or pounding heartbeats.
Before taking this medicine
You should not use methadone if you are allergic to it, or if you have:
- severe asthma or breathing problems; or
- a blockage in your stomach or intestines.
Methadone may cause a life-threatening heart rhythm disorder. Your heart function may need to be checked during treatment.
Some medicines can interact with methadone and cause a serious condition called serotonin syndrome. Be sure your doctor knows if you also take stimulant medicine, herbal products, or medicine for depression, mental illness, Parkinson’s disease, migraine headaches, serious infections, or prevention of nausea and vomiting. Ask your doctor before making any changes in how or when you take your medications.
To make sure this medicine is safe for you, tell your doctor if you have ever had:
- heart disease, a heart rhythm disorder, or a personal or family history of long QT syndrome;
- any type of breathing problem or lung disease;
- a head injury, brain tumor, or seizures;
- drug or alcohol addiction, or mental illness;
- liver or kidney disease;
- urination problems;
- problems with your gallbladder, pancreas, or thyroid; or
- if you use a sedative like Valium (diazepam, alprazolam, lorazepam, Ativan, Klonopin, Restoril, Tranxene, Versed, Xanax, and others).